We identify a class of point-particle models that exhibit a target-space duality. This duality arises from a construction based on supersymmetric quantum mechanics with a nonvanishing central charge. Motivated by analogies to string theory, we are led to speculate regarding mechanisms for restricting the background geometry.

• Received 13 November 2003

DOI:https://doi.org/10.1103/PhysRevD.70.085014